Pneumatic paintbrush



June 9, 1925. 1,540,759

J. H. cAHlLL ET Al.

PNEUMATICY PAINTBRUSH `Filed oct. v, 1922 ashets-sheet 1 ,Ugg

' June 9, 1925. 'l 1,540,759 J. H. CAHILL ET AL Pusumww PmufwmusnA Filed out. v, 1922 3 Sheets-sheet 2 Patented June 9, 1925.

n UNITED STATES PATENT g orrical f JAMES H. CAHILL, AND nALrH H.

Kinenoir, or cnicas-o, ILLINOIS. ies-storione To SEARS, ROEBUCK AND 00.", 0F CHICAGO, .'ILLINOIS, A CORPORATION OF NEWYORK.

PNEUMATIC PAINTBRUSH.

Application filed October 7, 1922. Serial No. 592,945.`

To ZZ 'whom t may concern:

Be it known that we, JAMES H. Carlini, and RALPH H. KINGnoN, citizens ot the v United States, residing-at Chicago, in the county` of Cool( and State of Illinois, have invented a certain new and useful Pneumatic Paintbrush, of which the following is a specification.` 1 Y This invention relates to an improved pneumatic paint brush `and aims toprovide a novel `brush which `is soconstructed lthat it may be quickly and easily disinembered and reassembled to permit of cleaning'and oiling, or substitution of nozzles.

Another object ofthe invention liesv in the provision in a pneumatic` paintbrush of a unitary demountable paint conduit' which, together with its nozzle, may be readily attached or detached by operating a single lockingwmember on the brush.

Another object is to provide an extremely simple paint nozzle and to mount it in such a way that it may be easily removed and replaced by other nozzles having different sized passages therethrough. I

Vrrnother object resides in the provision of an improved paint valve cooperating with the paint nozzle with a Wedgingaction to preclude the possibility of any leakage of paint from the brush when it is` not in use.

Another .object consists in the provision in the air conduit ofa tubular air valve voperating' member which is adapted to serve as a conduit for theA passage of air. therethrough after unseating the valve.

A further object consists in the novel arrangement of the air valve and` its operating member whereby a quick detachable operatingconnection is aiforded between the air valve and the paint valve lto enable the operation of both valves .inthe proper se qucnce by a single trigger.

Ai still further object consists in the novel construction and arrangement in the spray head of the brush hereinafter' to be described wherein Vall of thevpassages may be made straight andl hence: can be cleaned more readily.

The invention further contemplates the provisionof aiibrush of the character described which is of a balanced constructionv *n-'hcrein the paint and airlinehose connccticnsarc arraiwed so that theddo not hinder the operator in directing the paint stream upon the surfacebeing coated.

Other minorobjects and advantages will be pointed out asthe following;description progresses ,j i In the drawings illustrating a `preferred embodiment of our invention,fld`igure lqis a side view in elevation of the paint brush withits paint and Fig.y 2 is a longitudinal .vertical section' thereof. Figs.,` 3; and 4c, are respectively front and rear end-views. Fig; 5` isa trans-l verse vertical section taken .onth-e line 5-5 of Fig-.2. Fig. 6 is a viewpartlyin elevation and partly in sectionshowing the brush with its paint conduitin disassembled relation. Fig. 7 is avplan View of the main portion of thebrush as it appears'in Fig. (i, with the paint conduit is an underside duit, the of which planview of the paintcoir paint valve and appui-tenant parts havebeen removed. Fig. 9 is a removed.. FigJS i air line hose connections. 1

vie7 ofthe locking bolt andy yits coacting elements shown in perspective.. in dissociate'dnrelation, and Fig. :10 is asimilar view of the parts forming the operating `connection vwhereby `the air` valvel and the paint` valve are opefratedfl'ify1k the same trigger.

to be described, by the use of altrigger'l which the operator actuates with'y his forelinger Vwhile* supporting the brush by the handle and directing the paint stream upon the object Vor surfacebeing coated. f l

VThe handle 13is preferably cast with an integral hollow boss 17 `joining the parallel vertical side walls 18"and 19.` Extend# ing through the cylindrical opening 20 pio vided in the boss li" is an air connection 21 which is internally threaded as at 22l to receive `thc externally threaded inner cnil Throughout the views the saine referenceV w The 'operation of the, brush is controlled in a manner hereinafter'` of the air conduit 12. 'llelatter comprises shoulder 26 is presented on thershank 2'4at the reduced stein portion 25 which abuts the forward edge of the-side wall-s-18"and-'19 of the handle 13. In this way the air conduitir12" may` behrigidly' mounted? iny the handlef13-"byl threading Athe air connection 21 'upen'thei stem1-2`5 by' means of a wrench engaged iwitlr -thelfacet 27 provided on `the air connection. The stein portion 25 ofthe aircorrdniti12f-is milled to provide vertical channelsf2811on1oppo'site sides as most clearly appears: in` lto permit themovement ofth'e-` trigger'A 16, the twol legs 29 'of which st'raddle the stem 25 and are pivotally mountedsoln the walls-V18 and-19 on pins -30 permanently engaged therein.

Goacti'ngI withzthe legs 29 ofthe trigger 16a issasslidin'ggfollower'31 which isinI the form toliaaplate'having 4lateral lugs 32- for engagingathe linner. edges of the legs` of the trigger' (see Fig".y 10) 'anda narrow depend ing verticallug 33' :movable longitudinally ofth'e stemA 25 in a slot- 34 providedfin the wall vthereof and y opening; into the longitudinal bore 35 *provided therein. The. follower: Sli lits over V block.n 36. Whichiiis securedwby meansofaiscrew 37 to=a tube 3S fitting; snugly Within and slid'ableilongitudinally in the bore 35. lFVhenwthe trigger 16 is-` pulled,; the` oscillationz thereof com# municates-freciprocatory movement to the followeri- 31 whichl is'- transmittedv through the block 36 to the tube-3S. The latter upon :slidingginwardl'yis adapted to unseat a ballnvalve 39urged to seatlin the inner extremity-- of-the'fbore 35, by means of a coiled tension spring; 40' operating in. the bore 41Fof .the air-line connection 21. The tube.' 38 -hasa@ longitudinal secondary bore 42 adaptedrto permity the passage of air therethrough when the valve 39 isunseated. The inner extremity o'fthev tube 38 is notched asl shown at 43'suitably to reduce the end thereof to provide a bypass for the air under. pressure past the valve 39 when the-latteris held off its seat. Y

Communicating with the -bore 35 of the air conduit-12 isa centralain-dischargel orilice 44 .and Ya; lateral air discharge :ductE 45 which extend into the spray head portion 23' of the air conduit 12.. The. central orifice'44isadapted to jet a stream past the inouthuof a paint discharge lnozzle 46 Vextending vdiagonally through an opening 47 inv the sprayrhead 23 in frontof the orifice 44. The nozzle 46 has a paint discharge crifice 48 the size of which is variable to suit f' the particular grade or kindV of paint or other substance with which the brush is being operated. The duct 45 terminates on the-front face Aofthe spray head 23 -where an annular chamber 49 is provided between thehead 23 and an annular plate 50 seprovide the annular chamber 49.- The plateI isbore'dfto provide `ietV openings 55 -at diametrically opposite sides-above' and below the-central Ioriii'ce44and converging to appoint inA front ofvr the spray head 23 vtoflatten or fiare out the paintstream -sothat al section lthereof would appear as a straight line 'in' ama-nnen andk for apurpose well understood/'in this@ art. It-will be seen' rthat byivirtne of2 this-arrangement the passages in thea-head. and the removable' plate may be made straight rand: lhence may bei easilyv bored and'. also may be cleaned finore readily upon the removal of ithe yplate:

` Theshankiportion.24:0f the air conduit 12 is milledrou-t on'. its-upperfsurface to provide. a long-tiidinalfv channel L 56 extending forward to a: point inbaclri of the-spray head 23 as most clearly appearsin. Figs.- 2*, 6 and- 7; At thispoint thel bottom of the channel iinclines upwardly' to .provide a seat 57 for thepaiint 'nozzle' 46. Itis through this portion that 'the vopening 47 is provided to receivethe.nozzlef46il Thelpaint conduit 11 asf indicated: iniEig, is demountablc fromaior attachablelto the brush byvmovcf ment inza; lifneextending'at anacute angle to the axisf-ofithe airl conduit 12 to enter the paint nozzle 46 through the opening-*47, it ibeing. :understood that the paint 'nozzlehas a loose fit yin. the opening I47 and! a Acomparatively snugfor tightiiit inlthe cylindrical recess rpnovided. inthe paint conduit 11 so that the nozzle is removable with the paint a conduit as -a` unitiv rThe paint conduit 11 isgenerally rectanf gulariinl .cross section-,and is'arranged to fit closely.betweenthe walls 1S and 19 of the handle13` when. its forward end is entered intofthe channel-liiof,theair conduit with the nozzle 46 entered Ain the open'iug47 as describedl, The*paint/conduit11 is milled out onfeits oppositesi'desas most clearly appears imFigs. .GandS towprovide channels .59 wherein. ther-upper extremities of t-he legs 29' ofitlie1trigger16 are adapted vto oscillate in operation. The paint conduit 11 is of reduced.l cross section at the' point which overlies the slot 34 in the stem 25 of the air conduit 12 as yshown at GO inl lligz/ 2. The shankv portion 51 thus-formed is externally screw threadedat its inner extremity to Y make connection with the-air line hose 14; in any suitable manner. VOperating in a longi4- tudinal bore 62 in the forward or head end of thepaint conduit 11 is a paint valve 63 in the form of a cylindrical stem having a rounded head 64 adapted to coact with `the inner end of the paint nozzle 46 projecting into the recess 58 in the conduit 11 diagonally with. respect to the valve. The valve 63 in its reciprocation is .arranged to close a duct 65 leading to the nozzle 16 from the passage 66 in` the paint' conduit 11.` The valve 63 in this way serves as .a throttle valve to close the duct 65 and it also seats with a wedging action upon the inner end of the nozzle 46 to close the discharge orifice 48 thereof. rlhe paint valve 63 similarly to the tube 88, which operates to open the air valve 39, is provided with "annular grooves in which solid `t`rease or graphite is packedwhen the device is assembled so that the action of the members in the bores will be rendered easy and. there will be `no possibility of leakage past the same.

\ The inner end of the valve 63 protrudes from the conduit 11 over. the slot 34 provided in the stem portion of the air conduit 12 and is there provided with'an enlarged annular shoulder in the form of a rigid collar 67. Y Engaging the rear face of the collar 67 is a coiled tension spring 68 mounted on a cylindrical extension 69 of a block 70 secured upon the shank portion 61 of the conduit 11 by 'means of a. screw 71.

The valve 6?by virtue of this arrangement y is held yieldingly to seat against the paint nozzle 416 closing the duct as appears in Fig. 2. The `valve 63 is arranged to be openedin` the reciprocation ofthe follower 31 by the engagement of a lug 72 which projects upwardly in front of the collar 67 and partly encircles Athe protruding stem of the valve 63 (see Figs 10). It will be noted from Fig; 2 that a `lost'motion operating connection is providedbetween the air valve 'operating means andthe paint valve. i This is afforded by the displacement'of the collar 67 longitudinally of-the stem of `the valveV 63 away from the lug` 72 of the follower 31.

In this way the air valve 39 may be operated separately as4 when using the brush as a blower `but will otherwise be unseated slightlyFbefore! the valve 68is operated so that there will `be a flow' of air under pressure pastthe paint nozzle 116 before the paint is permitted toiiow, and in a like manner the iiow of air will continue. when the paint valve is'closed, the additional air which is 'permitted to flow being sufficient to 'draw out an f )aintreinaiuino' in the noz*V zle '116 so that we avoid `clogging' of the latter, which would result were any paint remaining therein permitted to dry.

The rear faceof the block opposite the stem portion 69is cut on an incline as shown at 73..V Extending transversely across the face 78 is provided a semi-cylindrical groove 711 inV which is adapted to engage ay segmental portion 7 5 `of a locking bolt 76 (see Fig. 9) which extends transversely between the walls 18 and 19 of the handle 13 as most n clearly appears in Fig. 7 shown in Fig. 9 is` cylindrical in form but is milled off `.to half its diameter 'as shown at 77, thus'providing the segmental portion intermediate the ends ofthe shank of the bolt. One end of the bolt 76 is enlarged,`

by means of a screw 82 threading' into the bolt 76. The face 73 `being cut in a plane parallel with the axis of thepaint nozzle 46 permits the removal of the paint conduit along a lineextending at an acute angle to the brush as indicated in Fig. 6 when the locking bolt 76 is rotated through approximately 1860` from the position shown in Fig. 2 so that the segmental portion75 occupies ythe `position illustrated in` Fig.l 6. It'will thus appear that the paint conduit may with its nozzle be dismounted from the brush simply by operating asingle locking element by the lingers. In order to avoid a projection from the side of the brush we prefer to form a recess 83 (Fig. 1) inthe outside of the. handle wall 18 wherein the ingerpiece 81 may swing.

. lt will thus appear that we have provided a pneumatic paint brush wherein the paint conduit, together with its nozzle, is readily demountable as a unit withoutthe useof any tools. Furthermore, the remainder lof the brush may be easily dismembered to permit of cleaning and oiling the parts.` A`

The bolt 76 asl further advantage of the construction which we have disclosed resides in the fact that the brush is well balanced since'the weight of the vconduits and the operating mechanism appurtenant thereto is offsetfby-the weight of the paint and air line hose connections so that the operator in handling the brush is not hindered in directing the paint stream uponfthe surface being coated as has been i the caseavith some brushes-,of this kind heretofore produced. Y y

`.Verealize that the embodimentV herein disclosed is` capable of considerable modifii cation without departing from thespirit of `our invention. It is` therefore our endeavor inthe appended claims to recite theinvention in terms tov comprehend all legitimate modifications and adaptations ofthe inven` tionA which would `occurftov one skilled in the art to which this invention relates.

lll e claim as our invention: u `1. A pneumatic spraying device compris ing a-handle,laz-pair of conduits-supported by said handle, one-of' said conduits serving to -conductl a. liquidi substance to be sprayedand the other the air adapted'to serve as the mediunrwherebv theliquid is transmitted in` the. form .of a spray onto/a surface to betcoated, saicliailrconduit being adapted lto be` removablysupported by said handle, and saliidrliquid conduit.being;de# mountably engageable 1 with saidair conduit, saidr conduits having int'erengaging, portions, and a member on said' handle adapted to ybe operated-to holdsaid liquid conduit securely in operative relation to said =air conduit or' topermit the same to be dismounteds 2. A pneumatic spraying.` device comprisi1ig a.liandle, arpair ofcondu'its adapted to be.- supported` thereby inf operative relation, one of'said conduits `serving-tei). conduct a liquid` substance tow beV sprayed and' the ot-her the.airlfortransmitting theiliquid in the form' of a spray onto a surface to be coated,r said air conduit being detachably supported by said handle,but adapted normally to be permanently secured thereto, said handlef comprising' extending Walls, said liquid conduitbeing' adapted to be demou'ntabl;7 associated in` operative rela-tion with said air conduit in engagement between said Walls anda klocking member carried by said handle adapted tobe operated to se cure said conduits in assembled operative relation.

3. InA apneumatic spraying device the combination of ahandle, aipair-ofconduits adapted to vbe supported ythereby in operativerelation', one of said. conduitsvfbeing adapted.tofconducta: liquid subst-ance to be sprayed and the-other lthei ai-r to serve asthe transmitting medium therefor, said' handle comprising 'a projecting' Wallf,one of vsaid conduits being removably supported there"- by, said conduitslraving portionsadapted to be: placed Ain register'when said conduits are assembled in operative relation supported; by said Wall., and awqu-iclrl-y releasable locking member carried by saidr Wall adapted tohold 'the other ofrsaid lconduits in -demountable relation to` the'lirst: menF tionedconduit.

Ll. ln'a` pneumatic spraying device the combination of a. handle, a :pair lof conduits adapted 'to be supported thereby inoperative relation,A one vof said :conduits being adapted toA conduct aliduid substancefto be sprayed andtheother the air to ser/vek as the transmitting medium therefor, one of saidA con'- duits being adapted to be removably.- sup.'- ported b v said handle andtheother'to be quickly demountable from' operative relation with thefrst conduit, one ofsaid vconduits having arecess andthe other a portion to engage intsaid recess in operative relation. with said. conduit, saidy demountable conduit beinfgi removableE 'byi movement i in a certaiir plane,l and` fquicklyf relea-sable' ymeans to'iprevent such movement.

In,V aV pneumatic spraying, device: the combination of `"aa-handle havinggspaced Epro.- jecting; \va-lls,, ai pair: of-z conduits adapted tofbe supported in operativere'lation thereby, one. of saildfconduit's conducting. av liquid substance to `becspfra'yed and tl1e'otl1ertlie air to' ser ve`r as i the= ltransmittimtp'fluidv there# for, one off said.' conduit-s.-` bei-ng adapted to be permanently assoeiated'wvith but:re movably mounted in said handle and i the other. quickly demountablez from .operative relation With the'ti1st:co1iduit, one of said conduitshavinfg 'a1 nozzle projecting therefrom `and thefother being provided :with an openingftoffrecei've4 the' same When said Icon'- duits are'inv operative relation,` said nozzle and. Zopeningiiinterfitting at one end of i said device, said conduits being received, between thev Walls of said:Y handlef ati the other ends, said demountable yconduit being:y removable by movementl along: thea-Xis of said vnozzle and quickly'- releasable meansfoperating between said .spaced ywalls `of said handle normally to= prevent' suchmovement.

6.- In av pneumatic paint' brush the combi nation of a zhandile,an-:ai-r conduit adapted to be rigidly engaged with said handle, a pai-nt conduit adapt-ed to b'e demountably engaged with said airconduit and said handle, kvalves for f said` I con duits,- vopera-ting` elementsA for" sa-idV valves, and' faLA single/triggerf fon actuating-L said i elements; saidV foper'- ating elementfor said pain-t valve havingv a lost motion `detachable operatinguconnection iv-ithfsaidtrieeer.

7. In aipneumatie spraying' device the combination .of la* handle :having i spaced pro'- jectinp; tvallsgthereon,` a fpfairi of conduits adaptedr toI beY supported thereby in operative relation,I one of :said conduits lconducting` liquid isubstance to be sprayed.` and the other the air.` to lserve as the transmitting medium therefor', each of said conduits havingr-1a control valve, a: trigger having a forked portion permanently mounted in saidV handle between said "spaced, walls thereof,'.said conduits beingimounted in ope-rative' relation inl saidhandle projecting between the legs ofV saidl forkedtrigger.

operating. stems for said. control vali Vyesaud means engageableby thexlegs lof saidtrigger for operating said .ste1ns.-

8. The combination of a pair of fluid conduits operating jointly tof discharge a combined stream? ofA fluid,. one of said conduit-s lnivingaI fluidi passage therein, a nozzle, a valve. operating-in said conduit Ato control the floiv of fluid through. said nozzle, tlie-ot-l-ier of said-condi'iits-havingv a bore therein,- a discharge orifice atone end thereof, andfa fluidconnection at'the other end, au valve; seatingj; to` close said bore against the flow of Huid to Said conduit, a tube movable in said bore to unseat said valve, said tube having a passage for permitting the flow of fluid through said con duit, the wall of said conduit being slotted longitudinallyV of said bore, a member *operating in said slothaving operative connection with said tube to move the same, and means providing an operating connection between said member and said valve for said first mentioned conduit.`

9. In a pneumatic paint brush the combinat-ion of an air conduit having an air discharge orifice, an airline connection for said conduit, a valvel for controlling the flow of air to said conduit, a trigger for operating said valve, a paint conduit adapt- 'ed to be operatively associated with said air conduit having a paint discharge nozzle eX- tending therefrom, said air conduit being provided with an opening to receive said nozzle, said nozzle being adapted to be entered in or withdrawn from said opening by movement in a line at an angle to the axis of said paint conduit, and means for holding said paint conduit inoperative relationto said air .conduit comprising a single movable member adapted in one position to permit movement along said line and in another position to prevent such movement.

y10. Ina pneumatic paint brush the combination of an air 'conduitvhaving connection with an air line, a paint'conduit having connection with a paint line, said paint conduit comprising a discharge nozzle adapted to project into said air conduit and removable las a unit with said paint conduit from -said air conduit, said air conduit being providedv with an opening to receive said nozzle, a lockingV member permanently associated with said air conduit for holding said conduits in operative relation, said paint conduit being provided with means coacting with said locking member to prevent movement `of said 'nozzle out of said opening to disassemble said paint conduit from said airconduit.

1l. Inapnenmatic paint brush the combination of an airA conduit having connection with an air line, a paint conduit adapted to be associated with said air conduit having connection with a paint line, said paint conduit comprising a nozzle, said airV conduit being provided with an opening to receive said' nozzle, said nozzle being adapted to be removably entered. in said opening in a line inclined relative to the axis of said air conduit, a locking memberpermanently associated. with said air conduit, said paint conduit being provided with a transverse groove in a portion rigid therewith, said-lockingmember being adapted in one position to lie in said groove to preventrelative movement of said paint conduit relative to said air conduit along said line and in another position to lie out ofsaid groove to permit suchmovement. Y

l2` In a pneumatic paint brush thecombination of an air conduithaving connection with an air line, a paint conduit adapted to be associated with said-air conduit having connection with a paint line, said paint conduit comprising a nozzle, said air conduit being provided with an opening to receive said nozzle, said nozzle being adapted to be removably entered in said opening in a line inclined relative to the axis of said airl conduit, a locking member permanently associated with said air conduit, a portion rigid with said paint conduit being formedwith a surface disposed in a plane extending to project into said groove'and inra rei leasing position to lie out of said groove ,flush with said surface to permit `movement of; said paint conduit in the plane of said portion toward or away from said air conduit. v j

13, In apneumaticpaint brush the combination of a handle having` vertically projecting' lateralwalls, an airzconduit permanently and removably `mountedI between said walls, saidconduit being provided with an air valve, a trigger pivotally mounted between said walls straddling said air conduit adapted to operate said valve, a paint conduit adapted to befmounted in juxtaposi-l tion to said air conduit to operate in connection therewith, said paint conduit having aY valve operated together with said air valve by said trigger, a paint nozzle projecting from said paint conduit in a line inclined to the axis of the air conduit, said air conduit being provided `with an opening adjacent the discharge end thereof to receive said nozzle, and means `acting, between said handle'and said paintconduit to prevent movement of saidpaint conduit in a line coincident with the axis of said'nozzle to hold said paint conduit in operative relation to said airconduit.

14C. In a pneumatic spraying device thc combination lof. a fluid conduit having connection in a fluid line, a` valve operating in lsaid conduit to control the flow of fluid therethrough, spring means normally holdu abut-nient -t-o'hold said conduits in operative relatioinand a trigger for said conduits to operatesaid f valves.

l5. rEhe combination in a device of the character described of a fluid conduit having-a fiuid passagewayI therein, said conduit being formed with an enlargedlho'llow conicalspray; head `at the discharge end'thereof, avcenti-al discharge orifice in said hea-d, and a discharge duct extending from said passageway tothe -outer edge ofthe 'face of -said head, an annular plate having an -inturned flange `protruding into said head topi'ovide-aflui'd tightljoint withthe inside conical surface of said head` said plate Vand head in operative relation being adapted toiprovide an annular space therebetween, an annular .member on said headl to seal saidA space-vandhoid said-plate in yoperat-ive position, vsaid platewbeing provided with vdischarge orifices converging toward a point in fi-ont. of=said head -toflatten the spray Vproduced in the action of said centralv discharge orifice.

'16. 'In a device of the character described, the combination cfa pair of fiuid conduits aidaptedto cooperateto discharge `a combined stream of fluid, a handle forsnpn porting saidk conduitsand directingthe fl-iiid stream discharged therefrom, 'fluid line connections'for said conduits extend-ing rearwardly therefrom past said handle, control yvalves for said conduits, operating -means therefor, andiatriggeroperating on one side of said handle to actuate -sa-id loperating means, said vhandle being made to extend downwardly fromsaid-device zit-said fluid line connections whereby the weight'of said conduits and appartenant operating connec- `tions is balanced on :said-'handle with said fluid line coniiectio-ns.

17. A pneumatic spraying device comprising, in combination, a handle,r an air conduitdetaohably` supported' by said handle, a

liquid conveying conduit supportedby said handleand said first mentioned conduit,

1 said liquid. conveying conduit being .quick-ly deniountable lfrom the other,l and y.meansy for controlling the flow offluid.throughsaid conduits.

1 8, A pneuiiiiatic spraying ldevicecoinprising, inl combination, a handlewhavin-g a-pair of spacediiupwaiidly projecting walls, .an air conduit adetachably,supported by said handle -between said walls, salliquid conveying conduit demountably supported above said air conduit between said-walls, andi means toi' c introlliiig1tlieiilow of=flni=d through said v conduit.

19. kArpneumatic yspray-ing fdevficevhaving, in combination, -.a handle having spaced upwardly `projecting malls, =a conduit supported .by said; handle, a second conduit supported by `.said iliandle between :said iwal-ls, said second conduit being quickly demounti scones able, fand operatingiineans -having )forked legs straddiing:saidconduits,- said legs lieing pivota'lily connected tosaid walls at the upper ends'.

' 20. 1A pneumatic.paint'biush having, in combination, a hand-le, an air, conduit .detachably .supportedfiby said handlefa paint conduit demoiintably lsupported by said: air conduit, valve means forsaid conduits, operati-ng elements for saidl valve: means, and;.-a trigger for actuatingsaidelements, the operating :elementifor the pai-nt valve having a. lost imotion,v connection with :said trigger.

21. A :pneumatic 4paint brush'having, iii combination, al support-ingineans, anl air conduit mounted onvsaid supportingfmeans, a paint i conduit demoun-tably .siippoited in operative relation utosaid lair conduit, :said paint conduit being removable by relative movement :in a substantially xlongitudinal piane,- `me ans Ifor I preventing suchsmovement, and means lior' controlling the :passages through said conduits.

22. A pneumatic spraying idevice comprising, in combination,-=arhanidle, an elongated conduit liaviinga connectiony in? a-flnid line, said conduit being providediwith a longitudinal bore, a valve-seating to close Asaid borev against the 54flow: offflfuidyia tube -movyable insaid bore'to unseatsaid valve, said tube i`bein-g provided lwith a `longitudinal fluid passagef and means-for moving said tube to unseatsaid valve.

23. TA- pneumatic :spraying device having, in combination, a handle,- ,ai conduit suppoitedi bysaild handle, a spray head on. said conduit, a longitudinal channel iny the outer vsurface of-said conduit, ian aperture extending from said channel-:into ,said spray head, a-conduit positioned in said` channel, a noz- AZle secured-to said lastimentioned conduit and f extending through Asaid i-aperture into said spray liead,-,an'd meansifor controlling thepassages throughsaid conduits.

Afpneumaticpaint bifushi-having, in Combination, a support, fan air conduit mounted insaidisuipport, Aa .spi-'ay heaid carriedrby -sai'd air f-condiiit, ia paint conduit mounted inlV operative. relation with y said air conduit, a removable paint nozzle: supported in .one xend of said paint conduiii and -extending intolsaitl spray head; means tor .holding the pai-nt conduit ini position, andrineans for `controlling the vflow ofnflniid through said conduits.

"251A pneumatic spraying device having,

i in combination,l tivoI 'fluidx conduits, i a nozzle havingaan orifice for discharging fluid from one of said. conduits, ineans'Or vforcing fluid ithrough said conduit, a valve* member for controlling the'flow.of fiuidrthrough .said

orifice, said valve :member 'being movable towardzsaidnozzle inla lineatianuangleto the axis .thereof i whereby torexert ai'ivedging action on the face of said nozzle to effect a sealing- Contact with said orifice, and means for operating said valve member.

26. A pneumatic spraying device having, in combination, a pair of conduits, a common support therefor, a nozzle for one of said conduits, said conduit being provided with a duct communicating' with said nozzle, a valve member longitudinally movable at an angle to the axis of said nozzle, said valve member in operation serving to close said 10 inei'nber and for controlling,` the-flow of fluid through the other conduit.

In testimony whereof We have hereunto 15 aixed our signatures.

"JAMES H. CAHILL. RALPH H. `KINGrDON-k 

